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Similarity and Differences of Hydrogen with Halogens

Which of the ...

Question

Which of the following statements (s) is /are true for IA elements?

A

Na is regarded as a typical/representative element

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B

Basic character of their oxides increases down the group

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C

Among alkali metal ions greater extent of hydration is highest in Li

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D

In general electron affinity values decreases from bottom in the group

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Solution

The correct options are
A Na is regarded as a typical/representative element
C Among alkali metal ions greater extent of hydration is highest in Li
D In general electron affinity values decreases from bottom in the group

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The electronegativity of halogens decreases from fluorine to iodine while the electron affinity has the trend

C l > F > B r > I

. The halogens are good oxidizers The oxidizing power of halogens in aqueous medium depends on their electron affinity, bond dissociation energy and heat of hydration. Basic character of their anions depends on their size and electronegativity. Similarly, the ionic character of the salts of different halides of the same metal depends on their electronegativity and size.

The heat of hydration and the basic character of halide ions follow the order:

State whether the statement is True or False:

Across a period there is an increase in electron affinity (EA) value and oxidizing capacity but both properties decrease down the group.

Q. Pick false statements from the following.

(a) The left side of the periodic table consists of the most electronegative elements and the right side of the table consist of the most electropositive elements.

(b) Paramagnetic nature, variable oxidation states, coloured compounds are exhibited by transition elements.

(c) Alkalis and alkaline earth metals react with water, liberating oxygen.

(d) Elements with a more metallic character form acidic oxides and with more non-metallic character form basic oxides.

(e) Melting and boiling points of metals and non-metals increase and decrease respectively along with a group.

(f) Elements belonging to groups IA-VIIA are called representative elements.

Q. Consider the following statements:
(a) Elements in a group have the same number of valence electrons.
(b) Variation of atomic size along a period shows an erratic behaviour towards the end.
(c) Electro-positive character decreases on moving down a group.
(d) Electro-negative in a period increases right from the alkali metal to the inert gas element.
Which of the above statement(s) is/are correct?

Q. In group Ia of alkali metals, the ionization potential decreases down the group. Therefore, lithium is a:

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Similarity and Differences of Hydrogen with Halogens

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